study development of micro mold for injection …
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STUDY DEVELOPMENT OF MICRO MOLD FOR INJECTION MOLDING
PROCESS
MOHAMAD NORSHARIZAL BIN ABDUL RAHMAN
2001476385
MOHAMAD FAIZUL BIN SELAMAT
2001476234
A thesis submitted in partial fulfillment of requirement for the award of Bachelor
Engineering (Hons) in Mechanical
Faculty Of Mechanical Engineering
Universiti Teknologi Mara (UiTM)
MARCH 2004
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ACKNOWLEDGEMENT
Firstly, we thank ALLAH S.W.T for giving us the strength and the spirit to
complete this project. We would like to express my gratitude to my Project Advisor,
Pn. Nor hayati Saad for the help and guidance in complementing this project.
We also would like to gratitude to our co-advisor, En. Abdul Rahim
Mahamad Sahab, the researcher at Ceramic Technology Centre, SIRJM Berhad. His
advised and guidance are useful for us in complete my project. He also gives us
much idea in completing this project. Then, the most grateful thank is to our family
because of their encouragement and support.
Lastly, we would like to extend our heartiest thanks to our entire classmate,
housemate and others who had given the assistance especially for their effort,
support and ideas directly or in completing our project.
ABSTRACT
Microinjection molding is usually to produce the micro part product. This
type of injection is well on the way to becoming a special variant of the industrially
established injection molding technology. One of the most promising fields of
application is medicine and biotechnology. The design for their micro mold is not
same with the conventional mold. We can look the different from the size of runner
design. We need to create the size, the suitable arrangement for the gate and runner.
The mold also has a different design. We need to create and contribute more idea to
produce the drawing design for this mold.
After completing the runner design, we need where the design is analyzed in
mold flow software. This software helps us to get the successful or unsuccessful
design. This analysis is very important to know the performance and parameter of
runner design. Analysis methodology can be divided into three parts. There are
analysis aims, analysis approach and filling analysis. The purpose of analysis aims is
to predict the flow behavior and mouldability of the component using the given
runner gate design in a four-cavity mould layout. The purpose of analysis approach
is to conduct the filling analysis with an assumption that efficient cooling was
achieved and the purpose of filling analysis is to predict filling pattern of the part,
temperature distribution of the flowing plastics and etc.
Lastly, that runner design will attach in mold design as a cavity. The micro
machining needs to be used to fabricate that cavity. All elements for mold design
must be considered before we create the complete mold.
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TABLE OF CONTENTS
CONTENTS
PAGE
PAGE TITLE i
ACKNOWLEDGEMENT ii
ABSTRACT iii
TABLE OF CONTENT iv
LIST OF TABLES x
LIST OF FIGURES xi
LIST OF ABBREVIATIONS xiii
CHAPTER I: INTRODUCTION
1.1 Proj ect Background 1
1.2 Objective Of The Project 2
1.3 Significance of The Project 2
1.4 Scope of The Project 3
CHAPTER H: MICRO MOULD FOR INJECTION
MOULDING
2.1 Injection Molding Description In General Terms 4
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4
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
What Is The Injection Mold?
Mold Base For Conventional Injection Moldings
Injection Channel
Guide System
Part Forming Component
Introduction To Micro Injection Molding
2.2.1
2.2.2
Development Of Micro Injection Molding
Special Requirement Of Micro Injection
Molded Parts
Element Of Mould Design
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
2.3.8
2.3.9
Machine Nozzle
Sprue Bushing
Sprue Puller
Runners
Gate Design
2,3,5.1 The Type Of Gate
2.3.5.1.1 Tab Or film Gate
2.3.5.1.2 Sub (Tunnel) Gate
2.3.5.1.3 The Fan Gate
2.3.5.1.4 The Diaphragm And Ring Gate
Venting
Cooling System
Ejection
2.3.8.1 Type Of Ejectors
2.3.8.2 Ejector Assembly
Leader And Alignment
Design Consideration For Micro Mold
2.4.1
2.4.2
2.4.3
2.4.4
2.4.5
Sprue
Runner
Gate
Venting
Cooling System
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